Layered structure and process of making the same



May 24,1938. A. E. MEADE 2,113,565

LAYERED STRUCTURE AND PROCESS OF MAKING THE SAME Original Filed Dec. 11, 1953 w l V Snventor ttomegv from gelatinizing. At this point a volatile solvent or thinner is slowly stirred in to flx the composition in such form that a flnely divided mineral anti-wicking agent can be thoroughly incorporated. This solvent is preferably composed of one hundred .(100) parts, by weight, of mineral spirits and one hundred (100) parts, by weight, of a coal tar solvent, such as xylol or toluol. At this stage glycerine or castor oil is added in the amount of about 1 to part, by weight, and the finely divided mineral anti-wicking agent, as for example titanium dioxide is then incorporated to the amount of from about 5 per cent to 25 per cent, by weight, and desirably, thorough mixture being obtained by grinding, as in pebble, stone or roller mills. The batch is then further thinned or diluted to the consistency desired for application purposes, as for instance by incorporation of additional thinners such as xylol or toluol in the amounts of from 10 per cent to 50 per cent, by weight.

The container structure, of hollow tubular form, is faced sprayed or dipped or suitably coated or surfaced with the composition, the facing sheet extending over the edges of tubes at their ends; and in cases where desired, this composition without the titanium dioxide may be incorporated as an inter-layer or adhesive between the paper laminations of said tubes.

The containers, immediately after coating, are then subjected to heat treatment, and I have found that this polymerized material is caused. by the action of the volatile solvent, to drive or force the anti-wicking agent or titanium dioxide into the pores or voids of the paper and preclude excessive absorption by the paper of the resinous mixture, which latter is thereby held on the surface and baked into a. condensed tough and elastic thermo-plastic film or skin layer, for instance by baking the tubes at C. for approximately 25 minutes or at approximately C. for about 15 minutes. This results in driving the anti-wicking or titanium dioxide content into the interstices of the paper while the solvents are working out and opening the poresfor thorough incorporation of the mixture and the formation of a tenacious tough fllm highly impervious to external moisture and to petroleum oils later to be stored or packaged in the containers.

The incorporation of the titanium dioxide also colors the coating white and provides a surface upon which labeling or advertising may be directly printed without necessitating additional expense for labels on containers.

The cylinders are finally headed or closed at both ends by closures 5, desirably by sheet metal heads, such as tin, or paper coated with the body coating, tightly crimped or flanged as at 6 over the ends of the container body. The crimping or flinging may be accomplished in thepresence of heat to render the ends of the coated cylinders tacky for closer adhesion to the closures. The container may be filled prior to the placement of the second end or closure, or one of the heads may be provided with a sealing opening to be subsequently sealed if preferred.

By crimping or hanging the flnal closing head at the time of sealing, a factory-sealed container is had, with all the, advantages and safeguards of an originally-packaged product free from contamination or substitutive adulteration.

Where desired, in manufacturing large containers, requiring extra reinforcing strength, the cellulosic layer body may include textile material or woven wire fabric or perforated or keyed paper for further strengthening and reinforcing cylinder walls or closures.

Container walls so produced are particularly advantageous in preserving any contents and particularly oil or grease contents of varied character free from contamination or change and without effect on the container by saturation, seam-leakage, cracking, or deterioration. The surface or facing layer retains an elastic resistant character. greatly conducing to effective pore-closure throughout and sealing of the entire structure as well as providing a smooth surface to facilitate emptying the entire petroleum contents of the package in a speedy manner without excessive adhesion of same to side walls.

These containers before being coated, can be embossed by means of embossing dies so that letters composing advertising matter, trade names, etc., stand out in relief on exterior of package, whereby their outer surfaces can be given a different color than that of the background by passing an inked belt or roller over said embossed letter surfaces, or by any other suitable means.

Other modes of applying the principle of the invention may be employed, change being made as' regards the details described, provided the features stated in any of the following claims, or the equivalent of such, be employed.

I therefore particularly point out and distinctly claim as my invention:

1. In a sealed container comprising a tubular, open ended paper shell and ends seamed thereto, said shell being of a porous nature, a flexible sheet of lining of relatively less porosity bonded to the shell to form a body structure and a continuous oil impervious surface membrane completely enveloping and keyed into the inner and outer surfaces and end edges of said body structure, the body structure and membrane coacting to produce a substantially rigid oil-impervious container.

2. In a sealed container comprising a tubular, open ended paper shell'and ends seamed thereto, said shell being of a porous nature, a flexible sheet lining of relatively less, porosity bonded to the shell to form a body structure and a continuous liquid-impervious surface membrane containing a phenolic resin and drying oil completely enveloping and'keyed into the inner and outer surfaces and end edges of said body structure, the body structure and membrane 'coacting to produce a substantiallyrigid oil-impervious container.

3. In a sealed container comprising a tubular, open ended paper shell and ends seamed thereto, said shell being of a porous nature, a flexible sheet lining of relatively less porosity bonded to the shell to form a body structure and a continuous oil-impervious surface membrane containing a polymerized phenolic resin and oil completely enveloping and keyed into the inner and outer surfaces and end edges .of said body structure, the body structure and membrane coacting to produce a substantially rigid oil-impervious container.

4. In a sealed container comprising a tubular, open ended paper shell and ends seamed thereto, said shell being of a porous nature, a flexible sheet lining of relatively less porosity bonded to the shell to form a body structure and a continuous oil-impervious surface membrane containing a phenolic resin, drying oil and an anti-wicking agent completely enveloping and keyed into the inner and outer surfaces and end edges of said .body structure, the body structure and membrane coactlng to produce a substantially rigid oil-impervious container.

5. In a sealed container comprising a tubular, open ended paper shell and ends seamed thereto, said shell being of a porous nature, a flexible sheet lining of relatively less porosity bonded to the shell to form a body structure and a continuous oil-impervious surface membrane containing a phenolic resin, drying oil, an anti-wicking agent and a pigmentizing agent completely enveloping and keyed into the inner and outer surfaces and end edges of said body structure, the body structure and membrane coacting to produce a substantially rigid oil-impervious container.

6. In a sealed container comprising tubular, open ended paper shell and ends seamed thereto, said shell being of a porous nature, a, flexible sheet lining of relatively less porosity bonded to the shell to form a body structure and a continuous oil-impervious surface membrane containing a phenolic resin, a drying oil and titanium dioxide completely enveloping and keyed into the inner and outer surfaces and end edges of said body structure, the body structure and membrane coacting to produce a substantially rigid oil-impervious container.

'I. In a sealed container comprising a tubular, open ended paper shell and ends seamed thereto, said shell being of a porous nature, a flexible sheet lining of relatively less porosity bonded to the shell to form a body structure and a continuous oil-impervious surface membrane containing a phenolic resin, a dryingoil and a pigmentizing agent completely enveloping and keyed into the inner and outer surfaces and end edges of said body structure, the 'body structure and membrane coacting to produce a substantially rigid oi1-' impervious container.

8. In a sealed container comprising-a tubular, open ended paper shell and ends seamed thereto, said shell being or a porous nature, a flexible sheet lining of relativelyless porosity bonded to the shell to form a body strucimre and a continuous liquid-impervious surface membrane containing a phenolic resin, a drying oil, lead acetate and-an anti-wicking agent completely enveloping and keyed into the inner and outersurfaces and end edges of said body structure, the body structure and membrane coasting to produce a substantially rigid il-impervious container.

9. In a sealed container, an open ended paper shell and ends seamed thereto, said shell being of a porous nature, and-a continuous liquid impervious surface membrane completely enveloping and keyed into the inner and outer surfaces and end edges of said body structure, the-body structure and membrane coacting to produce a substantially rigid oil-impervious container.

10. In a sealed container, an open ended paper shell and ends seamed thereto, said shell being of a porous nature, and a liquid impervious surface membrane completely enveloping and keyed into the inner and outer surfaces and end edges of said body structure, the body structure and membrane coacting to produce asubstantially rigid ail-impervious container.

ALEXIS I. MEADE. 

